Introducing OpenZeppelin Contracts v5.1

Compound Open Oracle Audit

Compound's Open Oracle System is a protocol aiming to provide an on-chain price oracle based on...

Security Audits Solidity Lending

Opyn Contracts Audit

The Opyn team asked us to review and audit the system. We looked at the code and now publish our...

Security Audits

Compound Finance

The Compound team asked us to audit their integration of Multi-Collateral Dai and the Dai Savings...

Security Audits Solidity Lending

PoolTogether Audit

The PoolTogether team asked us to review and audit the system. We looked at the code and now...

Security Audits

Aave Protocol Audit

The Aave team asked us to review and audit a pre-production version of their protocol. We looked at...

Security Audits Solidity Lending

Eco Contracts Audit

The Eco team asked us to review and audit the contracts for their open payment network. We looked...

Security Audits Solidity Payments

ArroToken Audit

The Arro team asked us to audit their ERC20 ArroToken project. We look at the code and now we...

Security Audits

A Year of Research at OpenZeppelin

It's been a busy 2019 for our dearest Research team. These are the main highlights of the year!.

Security Insights

Deep dive into the Minimal Proxy contract

In this deep dive into low-level EVM code, you will learn how to code a Minimal Proxy (EIP 1167)...

Products

Review Summary of Bounties Network

We take a look at Bounties Network implementation of MetaTransactions and find two medium severity...

Security Insights

Changing the feedback experience using positive psychology

One of the topics we focused on at OpenZeppelin this year was feedback. We feel that giving and...

Security Insights

Reentrancy After Istanbul

How to protect your contracts against reentrancy after Ethereum’s Istanbul hard fork.

Security Insights Products